<!doctype html>
<html lang="en">

<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>Template • TodoMVC</title>
	<link rel="stylesheet" href="node_modules/todomvc-common/base.css">
	<link rel="stylesheet" href="node_modules/todomvc-app-css/index.css">
	<!-- CSS overrides - remove if you don't need it -->
	<link rel="stylesheet" href="css/app.css">
</head>

<body>
	<section class="todoapp" id="todoapp">
		<header class="header">
			<h1>todos</h1>
			<!-- 添加任务 -->
			<input class="new-todo" placeholder="What needs to be done?" v-app-focus @keyup.enter="addItem">
		</header>
		<!-- This section should be hidden by default and shown when there are todos -->
		<!-- 当items.length 值为0时,表示false ,则不显示 -->
		<!-- template元素，页面渲染之后这个template元素就不会有
					，需要使用 v-if 与 template搭配，如果使用v-show是不行的 -->
		<template v-if="items.length">
			<section class="main">
				<input id="toggle-all" class="toggle-all" type="checkbox" v-model="toggleAll">
				<label for="toggle-all">Mark all as complete</label>
				<ul class="todo-list">
					<!-- These are here just to show the structure of the list items -->
					<!-- List items should get the class `editing` when editing and `completed` when marked as completed -->
					<li v-for="(item, index) in filterItems" :key="item.id"
						:class="{completed : item.completed,editing:item==currentItem}">
						<div class="view">
							<input class="toggle" type="checkbox" v-model="item.completed">
							<label @dblclick="toEdit(item)">{{item.content}}</label>
							<button class="destroy" :value="item.id" @click="removeItem(index)"></button>
						</div>
						<input class="edit" @keyup.enter="finishEdit(item,index,$event)"
							@blur="finishEdit(item,index,$event)" @keyup.esc="cancelEdit" :value="item.content"
							v-app-focus="item==currentItem">
					</li>
				</ul>
			</section>
			<!-- This footer should hidden by default and shown when there are todos -->
			<footer class="footer">
				<!-- This should be `0 items left` by default -->
				<span class="todo-count"><strong>{{remaining}}</strong> item{{remaining==1?'':'s'}} left</span>
				<!-- Remove this if you don't implement routing -->
				<ul class="filters">
					<li>
						<a :class="{selected:filterStatus=='all'}" href="#/">All</a>
					</li>
					<li>
						<a :class="{selected:filterStatus=='active'}" href="#/active">Active</a>
					</li>
					<li>
						<a :class="{selected:filterStatus=='completed'}" href="#/completed">Completed</a>
					</li>
				</ul>
				<!-- Hidden if no completed items are left ↓ -->
				<button class="clear-completed" v-show="items.length>remaining" @click="removeCompleted">Clear
					completed</button>
			</footer>
		</template>
	</section>
	<footer class="info">
		<p>Double-click to edit a todo</p>
		<!-- Remove the below line ↓ -->
		<p>Template by <a href="http://sindresorhus.com">Sindre Sorhus</a></p>
		<!-- Change this out with your name and url ↓ -->
		<p>Created by <a href="http://todomvc.com">you</a></p>
		<p>Part of <a href="http://todomvc.com">TodoMVC</a></p>
	</footer>
	<!-- Scripts here. Don't remove ↓ -->
	<script src="node_modules/vue/dist/vue.js"></script>
	<script src="node_modules/todomvc-common/base.js"></script>
	<script src="js/app.js"></script>
</body>

</html>